This result is slightly different from Theorem 18 of [1]}. Indeed, as distinct from [1]},
we do not impose any restrictions on the parameter \(\alpha _{3}\) , but at the same time we do not guarantee that the embedding \(B^{\lbrace s_{k}\rbrace }_{p,q}(\mathbb {R}^{n}) \subset L_{\max \lbrace 1,p\rbrace }(\mathbb {R}^{n})\)  is continuous.
